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><H1
CLASS="SECT1"
><A
NAME="PGARCHIVECLEANUP"
>F.25. pg_archivecleanup</A
></H1
><P
>  <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> is designed to be used as an
  <TT
CLASS="LITERAL"
>archive_cleanup_command</TT
> to clean up WAL file archives when
  running as a standby server (see <A
HREF="warm-standby.html"
>Section 25.2</A
>).
  <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> can also be used as a standalone program to
  clean WAL file archives.
 </P
><P
>  <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> features include:
 </P
><P
></P
><UL
><LI
><P
>    Written in C, so very portable and easy to install
   </P
></LI
><LI
><P
>    Easy-to-modify source code, with specifically designated
    sections to modify for your own needs
   </P
></LI
></UL
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN133828"
>F.25.1. Usage</A
></H2
><P
>   To configure a standby
   server to use <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
>, put this into its
   <TT
CLASS="FILENAME"
>recovery.conf</TT
> configuration file:
</P><PRE
CLASS="PROGRAMLISTING"
>archive_cleanup_command = 'pg_archivecleanup <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> %r'</PRE
><P>
   where <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> is the directory from which WAL segment
   files should be removed.
  </P
><P
>   When used within <A
HREF="archive-recovery-settings.html#ARCHIVE-CLEANUP-COMMAND"
>archive_cleanup_command</A
>, all WAL files
   logically preceding the value of the <TT
CLASS="LITERAL"
>%r</TT
> argument will be removed
   from <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
>. This minimizes the number of files
   that need to be retained, while preserving crash-restart capability.  Use of
   this parameter is appropriate if the <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> is a
   transient staging area for this particular standby server, but
   <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>not</I
></SPAN
> when the <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> is intended as a
   long-term WAL archive area, or when multiple standby servers are recovering
   from the same archive location.
  </P
><P
>   The full syntax of <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
>'s command line is
</P><PRE
CLASS="SYNOPSIS"
>pg_archivecleanup [<SPAN
CLASS="OPTIONAL"
> <TT
CLASS="REPLACEABLE"
><I
>option</I
></TT
> ... </SPAN
>] <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> <TT
CLASS="REPLACEABLE"
><I
>restartwalfile</I
></TT
></PRE
><P>
   When used as a standalone program all WAL files logically preceding the
   <TT
CLASS="LITERAL"
>restartwalfile</TT
> will be removed <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
>.
   In this mode, if you specify a <TT
CLASS="FILENAME"
>.backup</TT
> file name, then only the file prefix
   will be used as the <TT
CLASS="LITERAL"
>restartwalfile</TT
>. This allows you to remove
   all WAL files archived prior to a specific base backup without error.
   For example, the following example will remove all files older than
   WAL file name <TT
CLASS="FILENAME"
>000000010000003700000010</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>pg_archivecleanup -d archive 000000010000003700000010.00000020.backup

pg_archivecleanup:  keep WAL file "archive/000000010000003700000010" and later
pg_archivecleanup:  removing file "archive/00000001000000370000000F"
pg_archivecleanup:  removing file "archive/00000001000000370000000E"</PRE
><P>
   <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> assumes that
   <TT
CLASS="REPLACEABLE"
><I
>archivelocation</I
></TT
> is a directory readable and writable by the
   server-owning user.
  </P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN133858"
>F.25.2. <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> Options</A
></H2
><P
>    <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> accepts the following command-line arguments:

    <P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>-d</TT
></DT
><DD
><P
>        Print lots of debug logging output on <TT
CLASS="FILENAME"
>stderr</TT
>.
       </P
></DD
></DL
></DIV
><P>
   </P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN133870"
>F.25.3. Examples</A
></H2
><P
>On Linux or Unix systems, you might use:
</P><PRE
CLASS="PROGRAMLISTING"
>archive_cleanup_command = 'pg_archivecleanup -d /mnt/standby/archive %r 2&#62;&#62;cleanup.log'</PRE
><P>
   where the archive directory is physically located on the standby server,
   so that the <TT
CLASS="VARNAME"
>archive_command</TT
> is accessing it across NFS,
   but the files are local to the standby.
   This will:
  </P
><P
></P
><UL
><LI
><P
>     produce debugging output in <TT
CLASS="FILENAME"
>cleanup.log</TT
>
    </P
></LI
><LI
><P
>     remove no-longer-needed files from the archive directory
    </P
></LI
></UL
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN133881"
>F.25.4. Supported Server Versions</A
></H2
><P
>   <SPAN
CLASS="APPLICATION"
>pg_archivecleanup</SPAN
> is designed to work with
   <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 8.0 and later when used as a standalone utility,
   or with <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> 9.0 and later when used as an
   archive cleanup command.
  </P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN133887"
>F.25.5. Author</A
></H2
><P
>   Simon Riggs <CODE
CLASS="EMAIL"
>&#60;<A
HREF="mailto:simon@2ndquadrant.com"
>simon@2ndquadrant.com</A
>&#62;</CODE
>
  </P
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